package cn.pku.sirx.snad.ad.service;

/**
 * A contact of user influence services.
 * 
 * @author WangXiao
 */
public interface IUserInfluenceService {

	/**
	 * Get the influence of a user to another.
	 * 
	 * @param fromUserId
	 *            the influencer id
	 * @param toUserId
	 *            the influencee id
	 * @return the influence of a user to another
	 */
	double getUserInfluence(String fromUserId, String toUserId);

}
